In switzerland we also use the english word for them: Micro-switch. Stupidly, if it is the big brother (in geometrical termes) of the micro-switch, we simple call them "Grosser mikro-schalter" --> "Big micro-switch". Stupid but true :)

You're most likely to find it using the full name, roller lever arm switch, though it may also be abbrevated to just "roller switch."

Roller switches are commonly used as limit switches (e.g., for opening or closing a door or gate). They are typically momentary-contact switches, and may be wired as either normally open or normally closed (hence the three pins you see) depending on the application.

You should be able to get it at any electronics shop (even RadioShack, way in the back behind the cell phones) or even a hardware store with a decent electrical supplies section.

Yes. If you are using a switch without the roller, "lever arm switch" would be correct. Here's a Web page from a company which sells them: http://daltonengineering.co.uk/electrical/lever-arm-switch-for-cyclone-control-pan-and-power-winch-limit-switch.html

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